Twin Pipe Systems - ECR International Utica Boilers MAH-125 Installation, Operation And Maintenance Manual

WARNING
!
Asphyxiation hazard! Improper installation could
result in death or serious injury. Read Twin Pipe
Installation Instructions completely and understand all
requirements before beginning installation.

5.8 Twin Pipe Systems

Twin pipe venting allows exhaust flue and intake flue to be
separated from each other. Fresh air is drawn in at a different
area from the flue terminal location.
Twin Pipe CPVC System
A.
CPVC is approved for boiler exhaust. CPVC or PVC are both
approved for air intake.
To transition from Coaxial at the top of the boiler to Twin Pipe
CPVC/PVC a kit is available.
Twin Pipe Polypropylene System
B.
Single wall polypropylene is used for both exhaust and air
intake piping.
To transition from Coaxial at the top of the boiler to Twin Pipe
polypropylene venting an adapter kit is available.
Twin Pipe Separated Flue
C.
Exhaust and combustion air intake are not located in same
general location.
Twin Pipe - Common Atmospheric Zone
D.
Termination
Exhaust and combustion air intake are located in same
general location and are of equal length.
Twin Pipe Maximum Vent Lengths
(Includes first elbow and termination)
Boiler
125/150
3"
Vent Size
[80 mm]
Intake
49 ft
L1
[15m]
Vent
Exhaust
147 ft
L2
[45m]
Vent
Combined
196 ft
L1+L2
[60m]
Vent
Single Wall Elbows - Equivalent Length
3" (80 mm)
45° bend 0.82 ft [0.25 m]
90° bend 1.64 ft [0.50 m]
NOTE: Two pipe can be installed horizontally or vertically.
5 - COMBUSTION AIR AND VENT PIPING
165/205
2" 3" 2"
[60 mm] [80 mm] [60 mm]
Maximum
85 ft 100 ft 85 ft
[25.9m] [30.5m] [25.9m]
170 ft 200 ft 170 ft
[51.8m] [60.9m] [51.8m]
2" (60 mm)
3 ft [0.91 m]
5 ft [1.5 m]
FIGURE 5-8 - 2"/60 mm & 3"/80 mm Twin Pipe
Separated Horizontal Flue Termination
FIGURE 5-9 - 2"/60 mm & 3"/80 mm Twin Pipe
Separated Horizontal Flue Termination
FIGURE 5-10 - 2"/60 mm & 3"/80 mm Twin Pipe
Separated Horizontal Flue Termination With Tee On
Exhaust - CAN BE USED ON ALL SIZES
All
All
Minimum
6 ft
[1.8 m]
12 ft.
Grade, Snow
[3.6 m]
& Ice
20
Maintain 12"(305 mm) US, 18"(457
mm) Canada clearance above highest
anticipated snow level, 24" (610 mm)
above roof.
Avoid locations where snow may drift
and block vent and combustion air.
Ice or snow may cause boiler to shut
down if vent or combustion air becomes
obstructed.
240011941 REV G, [06/30/2019]
This Termination
can be used on:
2" / 60 mm ON
165/205
3" / 80 mm
ON ALL SIZES
vent only
This Termination
can be used on:
2" / 60 mm ON
165/205
3" / 80 mm
ON ALL SIZES
vent only
This Termination
can be used on:
2" / 60 mm
ON ALL SIZES
3" / 80 mm
ON ALL SIZES
vent only